A1183 ALLEGRO [Allegro MicroSystems], A1183 Datasheet - Page 7

• Manufacturer Part Number: A1183
• Description: Sensitive Two-Wire Field-Programmable Chopper-Stabilized Unipolar Hall-Effect Switches
• Manufacturer: ALLEGRO [Allegro MicroSystems]

A1180, A1181,
A1182,
Operation
The output, I
after the magnetic fi eld at the Hall sensor exceeds the oper-
ate point threshold, B
below the release point threshold, B
high. The differences between the magnetic operate and release
point is called the hysteresis of the device, B
Figure 1. Alternative switching behaviors are available in the A118x device family. On the horizontal axis, the B+ direction indicates
increasing south polarity magnetic fi eld strength, and the B– direction indicates decreasing south polarity fi eld strength (including the
case of increasing north polarity).
and
CC
, of the A1180 and A1182 devices switch low
A1183
I+
0
B–
(A) A1180 and A1182
OP
. When the magnetic fi eld is reduced to
B
HYS
Chopper-Stabilized Unipolar Hall Effect Switches
RP
, the device output goes
HYS
B+
. This built-
I
I
CC(H)
Functional Description
CC(L)
Sensitive Two-Wire Field-Programmable
in hysteresis allows clean switching of the output even in the
presence of external mechanical vibration and electrical noise.
The A1181 and A1183 devices switch with opposite polarity for
similar B
A1183 (see fi gure 1).
OP
and B
I+
0
RP
B–
values, in comparison to the A1180 and
(B) A1181 and A1183
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
B
HYS
B+
I
I
CC(H)
CC(L)
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